Re: [DML] Another Wiring Question.

[Soma576@xxxxxxx]

Hi Dale,
 
As soon as you said "ground loop problem in my subwoofer", you piqued my attention.  I too have a subwoofer and from time to time I hear this low rumbling coming from it, as if there are marbles on the speaker cone (Yes I pulled the woofer out of the box to make sure the wires weren't hitting the back of the cone).  Then it goes away. It does this either when the car is at idle or driving.  I don't recall if it does it with the engine shut off but accessories on.  I have not tried to use a meter to find the problem because I am not that smart!!  However, I attempted to eliminate ground problems from the beginning by only grounding all my equipment directly to the battery.  So, my amps, EQ, and head unit are all grounded to the battery.  Yet I get this odd sound from time to time that I suspect must be grounding noise.
 
When you find the answer to your problem, please let me know so I can see if it is affecting me too. 
Andy
 
-----Original Message-----
From: funkstuf@xxxxxxxxxxx
To: dmcnews@xxxxxxxxxxxxxxx
Sent: Sun, 6 May 2007 11:51 PM
Subject: [DML] Another Wiring Question.


Situation:  I have about a +1 volt difference of ground potential on my 
doors with respect to the rest of the car.  This is true of both 
doors.  If I ground one door to the body, they both end up grounded to 
0 Volts.  

To me, this means they're sharing a ground off of one of the circuits 
that's grounded to the door and somewhere else on the body and it's a 
bad ground.  Certainly I could set up a new ground from the door 
directly to the body but if anyone knows, I'd be very interested in 
knowing where the door harness is grounded back on the body, or which 
circuit this is because I believe that will be the best way to resolve 
the ground loop problem that I hear in my sub-woofer.  Everything else 
seems to be grounded well on the car when I do voltage checks. 
Any thoughts on this one?
Thanks,
Dale F.
#4984
#941
  



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